Suppose we have five observations, for which we compute a dissimilarity (distance) matrix as follows: ([0, 9, 3, 6, 11], [9, 0, 7, 5, 10], [3, 7, 0, 9, 2], [6, 5, 9, 0, 8], [11, 10, 2, 8, 0]). On the basis of these distances, which pair of observations are most similar?